Multiple Multi-sites on one set of core files

I need this wp-config.php is the new multi-site to have different credentials/parameters. Is this possible to setup different wp-config.php files for different multi-sites installation using one WP core files??

Sure. Mind you this is not a great idea.

if ( $_SERVER["HTTP_HOST"] == "example.com" ) {
// All the config info for example.com
}

if ( $_SERVER["HTTP_HOST"] == "otherexample.com" ) {
// All the config info for otherexample.com
}

Why do they need to be separate multisites?

Also sharing files may cause sync issues with upgrades and plugins, so be very careful.

Have you looked into setting up your site as a multinetwork site? There are plugins out there that make setting it up a breeze. Check out https://www.ads-software.com/plugins/wp-multi-network/

Hi Mike, so I would add these commands to the main wp-config.php file on the root level? What happens file I have a dev URL, would I have add that in as well?

Actually doing a little research, I was able to accomplish what I was trying to do from this article:

https://jason.pureconcepts.net/2012/08/wordpress-multitenancy/

This explained exactly what I needed to do in terms of setting up core WP files but also have unique wp-config files on lower levels of other instances.

Another article I found useful was:
https://viastudio.com/configuring-wordpress-multiple-environments/